Container base structure responsive to vacuum related forces

US8276774B2 · kind B2 · utility

Assignee

• Amcor Limited · AU

Inventors

• Terry D. Patcheak · Ypsilanti, US
• David Downing · Manchester, US
• G. David Lisch · Jackson, US
• Kerry W. Silvers · Campbellsburg, US
• Dwayne G. Vailliencourt · Manchester, US
• Brian L. Pieszchala · Ann Arbor, US
• Richard J. Steih · Jackson, US

Key dates

• Filing date: Nov 17, 2008
• Grant date: Oct 2, 2012
• Expiry date: Dec 20, 2030

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65D1/40
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

A plastic container has a base adapted for vacuum pressure absorption. The base portion includes a chime extending from a body portion to a contact ring which defines a surface upon which the container is supported. The base further includes a central portion defined in at least part by a pushup having a generally truncated cone shape in cross section located on a longitudinal axis of the container, and an inversion ring having a generally S shaped geometry in cross section and hinge means formed therein, and circumscribing the pushup. The truncated cone has an overall general diameter that is at most 30% of an overall general diameter of the base and a top surface generally parallel to a support surface.